Malicious PDF — malware analysis report

Static analysis result for SHA-256 6406282f615bf2e3…

MALICIOUS

PDF

70.4 KB Created: 2020-11-13 13:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0b3e43c09cee71ae876ebac3693d756d SHA-1: 9c693327fc1a5b1d23dba0b5ce7ab62cad57c842 SHA-256: 6406282f615bf2e37e4bf81b2457c46170cac8a59832cae1200b5b4e1f070265
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the external URIs, 'https://traffking.ru/123?utm_term=ultrazone+san+diego', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/123?utm_term=ultrazone+san+diego PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f92fa6cb4b30.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/ralovitinameli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5f9120a7eee4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377938/normal_5f954d8f95cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_5fae24e738e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383679/normal_5f9c3c6b1adeb.pdfIn PDF document text
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/manurukizivi_visin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f8be0236d468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusuberu/84078382159.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/kabagaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1187cde6-78b1-4efe-89b4-8d9377095405/jipeteruzekojuxovute.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/72586050253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0afd75-bee7-4af5-ab64-b3c9c9b4e979/28680435609.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/14463026755.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/65448533103.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/black_and_decker_mini_fridge_with_freezer_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 5032 bytes
SHA-256: c7eeb9fff23d45d7fa27be522d556a0c5d909c034a9ad933c57d6fd15d5fda7c
font_01_sfnt_off0000e748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE748 10968 bytes
SHA-256: 38c5fa6950a61bacac427778f58dc82ecbda9c1c9e6d47947c48c0a142dd50d9

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